How do I exclude messages from a particular board using a LiQL query?

dustin - Unfortunately, the current API versions do not offer a NOT operator to exclude boards or categories from calls.

SELECT * FROM messages WHERE category.id NOT IN ('xxxxxxxx','yyyyyyyy','zzzzzzzz')

So currently, the only ways to exclude boards are described within the reply from OlivierS.

I created an idea for this: http://community.lithium.com/t5/Product-Ideas/quot-NOT-IN-quot-operator-for-APIv2/idi-p/218558

Best,

Christian